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Thread: 1990 ef hatch mpfi swap help

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  1. 02-16-2012, 12:22 PM #1
    StarBwoy
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    Default 1990 ef hatch mpfi swap help

    i got a ef hatch that is dpfi and want it to be mpfi will the dash harness from a 1990-1991 ef sedan lx or ex work and plug up to a si ef motor harness and fit in my ef hatch

    list of stuff i have

    si dizzy
    si harness
    si cluster
    si ecu
    and the mpfi motor

    do i need any more stuff


    need info asap
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  2. 02-16-2012, 02:30 PM #2
    dc2gs
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    You gonna convert the dpfi harness? I don't think the si harness will plug in. And the dash harness will need to be modified for it to fit. I think one of the plugs is different. I havent done this in a while so I may be wrong lol someone correct me if I'm wrong
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  3. 02-17-2012, 12:19 PM #3
    StarBwoy
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    need more info im goin to change out the whole dash and motor harness and put mpfi one in dash from a sedan ef ex or lx and a si ef motor harness
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  4. 02-17-2012, 12:27 PM #4
    green91
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    You NEED to convert your stock engine harness. The Si/EX harness will be helpful to cut the plugs from. it will NOT plug into your car.
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  5. 02-17-2012, 12:58 PM #5
    StarBwoy
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    why. im taking out alllll the old harness wires and putting the new one in im confused i have all the si stuff the only thing that not si is the dash harness if i get a si dash harness will that work and plug up dont see why

    i have the motor mpfi
    ecu si
    dizzy si
    cluster si
    dash si
    dash harness dpfi
    motor harness si
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  6. 02-17-2012, 01:07 PM #6
    green91
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    have fun and make it harder than it needs to be!
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  7. 02-17-2012, 01:19 PM #7
    CptWitwiki
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    you got the resistor box?
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  8. 02-17-2012, 02:03 PM #8
    dc2gs
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    Dude just mod the harness you already have, it will be a lot easier than replacing all the harnesses.
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  9. 02-17-2012, 04:38 PM #9
    Cynical 1
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    http://www.fourthgenhatch.com/mpfi.html

    or:

    http://hondacrx881.tripod.com/mpfiswap.html

    or:

    http://hondaswap.com/swap-articles/d...writeup-49557/


    and all your questions will be answered...
    You're right - I have no idea what I'm talking about...



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  10. 02-18-2012, 01:02 PM #10
    StarBwoy
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    i already did the dpfi mpfi swap and didn't work checked all my wire and got a brand new dizzy it ran but wouldn't go over 4 grand then the next day it didn't give no spark so I'm want to put the whole si harness in it not hard i already put dash harness in before
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  11. 02-18-2012, 06:13 PM #11
    Cynical 1
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    Quote Originally Posted by StarBwoy View Post
    i already did the dpfi mpfi swap and didn't work
    then, you didn't do it right.

    not being a dick, but double check everything as you've obviously fucked something up...
    You're right - I have no idea what I'm talking about...



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  12. 02-18-2012, 05:13 PM #12
    RBS
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    you should just pay someone who knows what their doing to do it for you, because apparently now you f*cked your car up LOL
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  13. 02-18-2012, 07:19 PM #13
    StarBwoy
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    Quote Originally Posted by RBS View Post
    you should just pay someone who knows what their doing to do it for you, because apparently now you f*cked your car up LOL
    ha ha well you come and check it out
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